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Comparative table of different photo-detectors used in PET [13]
| PMT | APD | SiPM | |
|---|---|---|---|
| Gain | 106 | 50–1000 | 106 |
| Rise time (ns) | ~1 | ~5 | ~1 |
| QE @ 420 nm (%) | ~25 | ~70 | ~25–75(PDE) |
| Temperature sensitivity (%/°C) | <1 | ~3 | 1–8 |
| Bias (V) | >1,000 | 300–1,000 | 30–80 |
| Magnetic field sensitivity | yes | no | no |
| Sensitive area | cm2 | mm2 | mm2 |
